Frost history / Ft Calhoun 4W, NE
Ft Calhoun 4W, NE: frost dates by year
Last spring and first fall frost at NOAA station USC00252980, 2002 to 2023, measured from daily minimum temperatures.
Elevation 1,310 ft, 41.445, -96.093. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 18 | Oct 19 |
| Earliest | Apr 9 (2006) | Oct 6 (2012) |
| Latest | May 22 (2022) | Nov 2 (2021) |
| Trend | 10.6 days later per decade | little change (less than half a day per decade) |
| Years with data | 13 | 13 |
At 28°F (hard freeze) the median last spring date is Apr 15 and the median first fall date is Oct 25.
The trend is a straight-line fit through the years with a freeze. A positive spring trend means the last frost now comes later. Short or patchy records give noisy trends.
Chart
Last spring frost (32°F)
First fall frost (32°F)
Dots are single years. The gray line is the median, the green line the fitted trend.
Year by year
| Year | Last spring 32°F | First fall 32°F | Last spring 28°F | First fall 28°F |
|---|---|---|---|---|
| 2023 | Apr 24 | Oct 28 | Apr 23 | Oct 28 |
| 2022 | May 22 | Oct 15 | Apr 20 | Oct 17 |
| 2021 | Apr 23 | Nov 2 | Apr 20 | Nov 13 |
| 2020 | Apr 18 | Oct 16 | Apr 18 | Oct 24 |
| 2019 | Apr 15 | Oct 12 | Apr 15 | Oct 12 |
| 2018 | no data | Oct 15 | no data | Oct 15 |
| 2017 | Apr 12 | no data | Mar 19 | no data |
| 2016 | Apr 13 | no data | Apr 10 | no data |
| 2014 | Apr 18 | no data | Apr 16 | no data |
| 2013 | May 4 | Oct 21 | Apr 25 | Oct 25 |
| 2012 | Apr 12 | Oct 6 | Mar 10 | Oct 27 |
| 2011 | Apr 18 | Oct 19 | Mar 30 | Nov 10 |
| 2007 | Apr 12 | Nov 1 | Apr 10 | Nov 6 |
| 2006 | Apr 9 | Oct 12 | Mar 26 | Oct 12 |
| 2003 | no data | Oct 27 | no data | Nov 5 |
| 2002 | no data | Oct 19 | no data | Oct 23 |
"none" means the station recorded no freeze at that threshold in that half of the year. "no data" means more than 10% of the season's daily readings were missing. Years with no usable data are left out. See the methodology for the rules, and the ZIP lookup for 1991 to 2020 frost probabilities.